'Aag Ka Darya' (River of Fire), a landmark Urdu novel spanning 2500 years of history from the Mauryan era to post-Partition India, was written by:
- Qurratulain Hyder
- Ismat Chughtai
- Khadija Mastur
- Hajra Masroor
Answer: Qurratulain Hyder
Qurratulain Hyder published 'Aag Ka Darya' in 1959. It is widely regarded as one of the greatest novels in the Urdu language.